When choosing a site, avoid trees, buildings or obstructions,
which could cast shadows on PV modules especially during
the winter season when the arc of the sun is lowest over the
horizon.
5. MODULE TILT ANGLE
The PV modules produce more power when they are
pointed directly at the sun.
For grid-tie installations where the PV modules are attached
to a permanent structure, PV modules should be tilted at an
angle equal to the site's latitude. This will typically result in
the highest annual energy output.
6. INSTALLING PV MODULES
A minimum spacing of 2
” (50 mm) is required between the
PV module and the mounting surface around the perimeter
of PV array. The PV modules may be installed in various
applications utilizing a variety of support structure options
and attachment methods.
For optimal performance in all
applications, clearance between the module frame and the
mounting surface is required to allow cooler ambient air to
circulate around the back of the module
and to avoid
module and/or wiring damage. A minimum of .13
” (3.2 mm)
spacing must also be maintained between module frames
to allow for thermal expansion.
The PV modules may be attached to a support structure by
the following methods. The structure should have enough
strength to achieve the mounting span. When installing
modules in a snowy area, an appropriate countermeasure
has to be taken to prevent possible damage to the lower
side frame by slipping snow (e.g. attach supporting parts to
the lowest modules.). Any damage caused by snow or such
countermeasures is not covered under warranty.
BOLTING
: Use 5/16
”(8mm) stainless steel
(or equivalent in
corrosion resistance) hardware through the existing .35
” (9
mm) diameter mounting holes in the module frame and then
through the holes on the support structure. Tighten the
screws with adequate torque (usually 132 in-lb; refer
structure manufacturer specifications). Refer to the module
drawings (Section 12) for the position of mounting holes.
CLAMPING
: Fasten modules firmly using clamps which will
not be deformed by wind load or snow load. Clamps should
be attached to support structure with 1/4
” (6mm) or larger
bolt and nut using torque values specified by structure
manufacturer. Bolt and nut should be stainless steel or
equivalent in corrosion resistance. Support structure should
be set perpendicular to the long side of frame, and should
support the bottom of module at least 0.39
” (10mm) width.
Clamps must not bend the module frame nor damage the
surface of the frame. Clamps also must not shade the
sunlight incidence on glass surface. Take measures to
prevent module from falling off clamps. Refer to the
‘CLAMPING AREA’ in the module drawings (Section 12) for
the permissible clamping range.
The clamp specification is below;
A- SUS304 or equivalent
t: thickness
L: width
a: overlap
0.079" (2.0mm)
and over
min. 2.76"
(70mm)
0.098" (2.5mm)
and over
min. 1.73"
(44mm)
0.12" (3.0mm)
and over
min. 1.50"
(38mm)
B-anodized aluminum AL6063-T5 or equivalent
t: thickness
L: width
a: overlap
0.12" (3.0mm)
and over
min. 2.28"
(58mm)
0.14" (3.5mm)
and over
min. 1.65"
(42mm)
0.16" (4.0mm)
and over
min. 1.50"
(38mm)
min. 0.28"
(7mm)
min. 0.20"
(5mm)
a
t
L
The clamp shape and dimensions above are for reference
only, and any damage caused by clamps is not covered
under warranty.
7. MODULE WIRING
The PV module comes pre-wired. Each module has two #12
AWG type PV-wire stranded sunlight resistant output
cables
each
terminated
with
R51-7/P51-7
(MC4
compatible). The positive (+) terminal has a male connector
while the negative (-) terminal has a female connector. The
module wiring is solely for series connections only, i.e. male
(+) to female (-) interconnections. Series and/or parallel
connections shall be made with #10-14 AWG type PV-wire
stranded output cables, having sunlight resistant and
temperature rating of 90
℃
minimum, with R51-7/P51-7 (or
MC4: PV-KST4/KBT4).
NOTE
: When making connections with the connectors,
make sure the array is disabled.
DO NOT MAKE
CONNECTIONS WHILE UNDER LOAD
.
Module output
connections are marked “Do not disconnect under load”.
NOTE
：
MAXIMUM SYSTEM VOLTAGE IS 600 VDC.
The PV module and most PV system components have a
maximum system voltage rating of 600 volts DC. Some
grid-tie systems operate at or near this voltage rating. Like
other polycrystalline PV modules, the open circuit voltage of
the PV modules increases as the ambient temperature
decreases. Maximum system voltage is computed as the
sum of the open-circuit voltage of the series-connected PV
modules for the lowest expected ambient temperature.
Refer to the National Electrical Code Article 690-7(A) for
determining the maximum number of the PV modules that
can be placed
in series. Temperature coefficients, specific
to the module of use, can be used to provide the most
accurate prediction of module voltage under temperature
extremes.
NOTE: Limit the maximum number of series connections of
the PV modules so that the system voltage is 600 V or less.
NOTE: Do not connect the modules in parallel without
maximum over current protection.
NOTE: The minimum radius that the cable can be bent for
the PV modules is 1.14
” (29mm).
NOTE: Under normal conditions, PV modules may produce
more current and/or voltage than reported in the standard
test conditions. Therefore, when voltage evaluations for
components, capacity of conductors, size of fuses, and size
of control systems connected to the module output are
determined, multiply the values of short-circuit current (Isc)
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